A small car with mass m and speed 2v and a large car with mass 2m and speed v both travel the same circular section of an unbank
ed road. If the frictional; force required to keep the small car on the road without skidding is F, then the frictional force required to keep the large car on the road without skidding is (A) 4F
(B) 2F
(C) F
(D) F/2
(E) F/4
Since the circular section is unbanked, the centripedal acceleration acting on each of the cars is
Therefore the centripetal force on each car
Since this means the friction force required to keep the large car on the road is only half of the friction force required to keep the small car on road
The answer is false. The speed of the astronaut cancels out the force of gravity, causing a 'stationary freefall'. While under these effects, it is not required for an astronaut to 'strengthen' his body.
I am thinking that maybe the problem is not with the calibration. It might be that the buffered solution is already expired since at this point the solution is already not stable and will give a different pH reading than what is expected.